What should be included in network configuration documentation to comply with PCI-DSS?

In the context of complying with the Payment Card Industry Data Security Standards (PCI-DSS), including justification for all services and protocols used in network configuration documentation is essential. This requirement ensures that every component of the network is accounted for in terms of its necessity and security. By justifying services and protocols, organizations demonstrate their commitment to maintaining a secure environment that adequately protects cardholder data.

The justification process helps identify whether the selected services and protocols are appropriate based on the current security risks and regulatory requirements. It fosters a clear understanding of the rationale behind choosing specific technologies over others, which is invaluable during audits or assessments. Proper documentation not only aids compliance but also enhances the organization's overall security posture by ensuring that every element is purposeful and aligns with industry best practices.

Other options, while potentially useful in certain contexts, do not specifically address the rigorous requirements set forth by PCI-DSS. For example, cost estimates may support budget planning but do not directly contribute to security compliance. Visual aids could enhance understanding but are not a compliance necessity, and historical data on network performance, while informative, does not inherently reflect the current state of compliance with security standards.